OK, so I’m still quite happy with my last line, just because I like the ring of any line of the form “I’m not a …”, which I stole from a friend Sam Bartlett who employs it comedically better than I ever could. But I was being rash – a teacher is, to some extent, an entertainer.

I clarified by saying that I think there is rather a glut of mathematical nuggets out there and so I’m looking to provide something different. However, I do like nuggets, so I’ll allow myself one (and only one) blog post to share some of my favourites: